Log Message:
0.30    2014/11/26 14:29:28
        [CHANGES]
         * Rename 'dependent' futures to 'convergent'
         * Removed examples/ scripts that now exist as independent modules
         * Added ->without_cancel
         * Sanity-check the $code argument to ->on_{ready,done,fail,cancel} to
           ensure it is callable or a Future

        [BUGFIXES]
         * Ensure that 'ready_at' is always set in DEBUG mode
         * Fix DEBUG 'lost_at' line number reporting tests for latest
           bleadperl (RT99002)
         * Ensure that if Future::Utils::repeat condition code dies, that is
           passed to the result Future and not propagated to the caller
           (RT100067)
         * Failure by returning a non-Future from a sequencing code block
           should report as a failed Future, not throw exception to caller